“Studies comparing the infected and the noninfected raise the possibility that the parasite tweaks a person’s personality or ups the risk of suicide attempts, brain cancer and schizophrenia. Studies in people even report links between T. gondii and traffic accidents, greater odds of having sons than daughters, extra height and unusual opinions about the smell of urine. If so much of what people do turns out to have a touch of parasite about it, then the notion of normal human behavior may have to change.” http://www.sciencenews.org/view/feature/id/347461/description/Little_Mind_Benders